Performance exhaust manifolds vrs headers

[Matthew Jeschke]

I am curious has anybody tried a high flow exhaust manifold? I wounder how they stack up to headers.

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[iamdub]

What's a "high flow exhaust manifold"? I'm picturing an aftermarket cast iron manifold with larger primaries and/or a smoother finish. Have a link to it?

 

[Matthew Jeschke]

What's a "high flow exhaust manifold"? I'm picturing an aftermarket cast iron manifold with larger primaries and/or a smoother finish. Have a link to it?

I was googling and found a couple. Frankly I havr been interested in upgrading to long tube headers...

I like the idea of manifolds though as I feel like headers dump a lot of heat into engine compartment. Additionally they don't last as long. Although I have very little experience with headers. Manifolds just seem more durable...

https://www.summitracing.com/parts/...-8mwHAHNq-hlJKXjjGJIQ2V6ufjCV6hRoCamwQAvD_BwE

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[Matthew Jeschke]

Honestly maybe these are for a different application? I found these too...

https://www.eastwood.com/******-gm-...PTECCG5eTEto4xciLdVypoAGxWDK34GhoC580QAvD_BwE

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[Sam Harris]

Honestly maybe these are for a different application? I found these too...

https://www.eastwood.com/******-gm-...PTECCG5eTEto4xciLdVypoAGxWDK34GhoC580QAvD_BwE

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Yeah those are turbo manifolds.. I’d never talk you out of buying them though.. [emoji16]

 

[Matthew Jeschke]

Darn, do you know if they make anything such as a high flow exhaust manifold? I just like the idea of a highly durable exhaust with performance of a header.

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[iamdub]

I was googling and found a couple. Frankly I havr been interested in upgrading to long tube headers...

I like the idea of manifolds though as I feel like headers dump a lot of heat into engine compartment. Additionally they don't last as long. Although I have very little experience with headers. Manifolds just seem more durable...

https://www.summitracing.com/parts/...-8mwHAHNq-hlJKXjjGJIQ2V6ufjCV6hRoCamwQAvD_BwE

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I remember those now. I don't see any real benefit with those over the stock manifolds. I agree with headers convecting more heat into the engine bay. If I ever did any kind of headers, I'd have them ceramic coated. I'd get coated shorties before those aftermarket cast ones, otherwise I'd keep the stock manifolds. My ultimate goal for headers is Doug Thorley Tri-Ys. Also, I don't think those are a direct bolt-on for a truck. You'd probably need a custom Y-pipe or modify your current one. After all that, you'd have made virtually no difference over stock.

 

[Matthew Jeschke]

Do those wraps help keep headers cooler, and last longer?

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[Sam Harris]

This is what you need:
https://americanracingheaders.com/c...ucts/gm-truck-4-8l-5-3l-1999-2006-long-system

 

[SNKETR]

Do those wraps help keep headers cooler, and last longer?

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Disclaimer: I haven't looked in to wraps in the last couple of years, so not sure if the tech has changed. With that being said.... They can help with temperatures but everything I have heard is they're better for racing applications. For a daily driver if its rains and they get soaked in water they can retain moisture and add to corrosion.

Personally I'd rather ceramic coat anyway. I prefer the look and it's one less thing to worry about damaging or attaching.